Carbureter.



R. A. DUFF.

CARBURETER.

APPLICATION FILED .APR.25, 1913 Patented Dec. 8, 1914 3 SHEETS SHBET 1.

Attorneys Witnesses Patented Dec. 8, 1914.

3 SHBBTS SHEET 2.

Witnesses Attorneys R. A DUFF.

GARBURETER.

APPLICATION FILED APR25. 1913 Patented Dec. 8, 1914.

3 SHEETS-*SHEET 3.

d r I Attorneys rrs smi es iggzrnnr enr c RALPH A. DUFF, OF NEBRASKA CITY, NEBRASKA.

. GARBURETER.

Application filed April 25, 1913 Serial No. 763,684.

To all whom it may concern:

Be it known that I, RALPH A. DUFF, a citizen of the. United States, residing at Nebraska City, in the county of ()toe and State of Nebraska, have invented a new and useful Carbureter, (Case A,) of which the following is specification.

The present invention relates to improve-' the speed thereof.

A further object of the present invention is the provisionof means for producing an attenuation of the air supply, as the same enters the carburetor, whereby the air will re -(lily min with the fuel, a deflector being provided, fortlie double purpose of receiving-the air supply, and for directing the mixture of fuel and air, or carbureted air, out of the carbureter to the n anitolch v A further object of. the invention is: the

- provision of ii novel. and sixn 'ile mechanism for suci'zessively opening the tool inlets and another niechanisni operated consonantly therewith .i'or gradually increasing the ctlective area of the air port, as the fuel inlets ilniivings-Figuro i a vi of the complete carhuretor from the controlling side lllll'z-Ol. a section taken on line of Fig. l look n his; :3 is

in the d rection of the Section taken through the amp o rotor upon the line lfll oi" it i in. i i a section taken on, line 4 4 of Fig. 3, por tion of the surllon adjacent to one ol the fuel inlets being;- further cut away to illustrate the position (il tlle valve thereof relatively specification of Letters Patent.

' valve 3 Patented Dec; 8, 1914;

to the operating medium. Fig. is spective view of the outer nieinber of tli'e ,ii' controlling neans. Fig. 6 is a si nilar' vi e'w of the inner member of the ainconti'olliii g means. Fig. 7 is a perspective View bf th'e fuel valve controlling means. Fig'Q fi partial blank view thereof. 'lligs ftl'find i0 are detail sectional views of the'low p by-pass Fig. 11 is a. sectional View throngh 1;, one of the fuel control valves. 5 leferring to the drawings, the nuine til 1 dcsigna the cylindrical easing {no dil with a remomlile end 1, and liavim i manifold correcting and carhui'etie'd 'a V rootingineinhcrzfi lcdtherefroin. YA butterfly is mounted in the il'lGl'l'llJl-ll Zia; is provided with the recess 4 in the pea ph cry thereof which is adaptedto'cOact witli the adjustable screw 5 so as to itbljlipll fl portage at such point to control the Sup, ply ol' carlun'eted air to the 1I'li1l1ifQlCl \l{l1ll the butterfly valve 3 in a horizontal The float chainber (5 is in coin'nniiiieat n with a fuel suppiy through the condui while disposed concentrically withi ir'th chanilicr or casing l is the tube 8,' wliici i provides a guiding means for the float- 9,

said lioat being disposed to operate upon the oppositely extending arms 10 m le v the valve ll into soatingand unscatiiig p'osition.

lied from the a hollow stein medium I :iilll the ('nr iii'f the llH/l is l div i 1;il2lllil)0i' or easingl' which prm ides a con n the iioat chaniher 0 means by \a'h into the "'l clnimlier 1 having tho i l and the drain (:OCii' I i h mix/Alvi or iii it being adapt d. as \xill presently appear; to l e controlled l the nwiuhoz' 1 3. so that the swim.- nniv he opened or rlos'ml succe jot l llH-ro lH'lllL seven einpll'iyed in this i1;

l p-UH. i;- disposed in one of the ports 20 of V the upstanding Mb 17 and the flow of fuel valve 2]., being normally projected through the port. .53 into the path of to be engaged by the valve operating member 16. The nozzles it are arranged in twoscts, one ot three and the other of "Bo r, and the nozzle 18 being in line with the one set of three nozzles. 'A. fuel conducting channel or bore 25 is provided in each valve member 21 and thus leads from the enlarged headed portion thereof throughout the length into the interior of its respective nozzle 19,. which as clearly shown in Fig. 3 are disposed at divergent angles, at a point slightly above the angles 26 of the auxiliary deflecting members 27, which are mounted within the casing l and provide a longitudinally dis posed channel or chamber therein outlctting into the fuel distributing member 2. u The nozzle 1.8 is in direct communication with the chamber 13. Mounted detachablywithin the casing 1 against the sealed head there of and extending the full length thereof at equidistancc from the auxiliary deflectors 27 is the main deflector 28, the same being provided with an apron 29 disposed to projcct above the central portion of the rib 17 and don iiwardlybetween the two divergent sets of nozzh so as to provide a fuel channelupon each side of the deflector 28 and the respectiveauxiliary deflectors 727.

The valve operating member '16, as clearlv shown in Figs. 7 and 8, is provided with the journaling heads 30 at the respective ends thereof and with the operating stem ill, said stem 3.1 being controlled as will presently appear.- The intermediate portion of the nn'anber 16 is provided with the respective recesses 32, there being one to each valve of the respective nozzles or iets 19, so disposed that the Valve at the ogposite end of the rib 17 asat a Fig. 8 and in the set of nozzles at the opposite side to the owl Y-lel8 will he the first of the valve con trolled nozzles to be opened, the continued oscillation of the memberlti successively opening as at b, 0 and d Fig. 8, all of the valves of that set, and then finallylsucces sively opening as at e, f and g, Fig. 8, the ones in the same set with the normally opened valve jet 18. i 1

Connected to the stem 31 is a toothed segment 33, uponthe exterior of the casing thc teeth thereof being disposed to be' en gaged by the tootl'iedsegment. '34, and the adjustn'icnt of suchsegment 38 being limited by the pin and slot connection 33; The

segment is keyed to the hollow stem 35 of theair controlling member 36, best shown in Fig. 5 and is provided with the upstanding toothed segment 36 which is in engagement with the segment 37 which controls the butterfly valve The lever 38 is connected to the member 36, and thus provides a means whereby the member 16 and the aircontrolling member 36 and also the,but-

terll y valve 3 are operated in consonance so i as to produce the pro er proportion between the air and fuel and the introduction of the carbureted air into the manifold of the engine.

The member 36 which is constructed in the form of a mutilated cylinder with a sealed end, is insertibleywithin the casing 1' through the open end thereof, and is 'so formed as to have the inclined edges 39 and 39, which constitute a means, as will i iresently appear, for providing the proper gradual admission of the air or the cutting down thereof through the ports 40-40 disposed longitudinally o'f'and at opposite sides of the casing 11, and as particularly shown in Figs. 2 and f3. Theseports -l040' are disposed to introduce the air into the space below the portions 26 of the auxiliary dellcctor 27; so that the air inrushing at such points is caused to pass about the respective nozzles 19 and be deflected by the apron 25) upwardly into its respective channel .between the auxiliary deflector '27 and the adjacent side of the main deflector 28 at which point the. air is properly intermixed with the atomized fuel, there being an interception of the streams abovethe upper end of the main deflector 28 due to the formation of the inner walls of the auxiliarydeflectors 27. so that when the carbureted air is directml through the member 2 intothe manifold, the best possible mixture is pro vided with practically no streaks and in the proper proportion according .to the load placed upon the engine. i

V The auxiliary deflectors are so mounted, w thin the CHSlllfI 1 as to provide the moose sary space therearound adjacent the wall of the member 1 to permit oi the proper introduction and oscillation of the air con; trolling member 136. It will also he noted in Fig. lthat the hollowstem 35 is mounted for'oscillation within the removable cover 1 of the carburetor wliile extended concentrically therethrough is the stem 4t which carries the aux liary air controlling member 42, best shown in perspective in Fig. 6. {The dotted lines shown in Fig. 5 illustrate the position of the imcmber 42 within the member 36, the, inclined edges 43 43 thereof being disposed to be adjusted relatively to the edges llilfil of H member 36, to regulate as will presently appear, the size of the inlets 40 l inde pendently ol' the oscillation or inovmnent of the member 36.

member 42 upon its respective edges The auxiliary controlling TI i 17, so that even should the auxiliary member '42 be in the position to have its respective portage at 4444' sufliciently to permit of "the carbureter running under a low speed or atfthe'time of initial starting.

In order t0.cntrol the action of the auxilia'ryair-device 42, there is connected to the "stem 41 thereof beyond the tubular member of'themain air control member 36, the disk 45, having the depending arm 46. This depending arm 46 is fitted astride the screw 47 which is journaled in the lugs 48 carried by the segment 3i, and controlled by the milled head d9.

It will thus be seen that by the rotation of-the milled head l9, that the screw 47 will 7 impart movement to the arm 41' and thus move the auxiliary air valve so as to "project'the edges 43-l3 Within or beyond the edges 3939', respectively, of the member 36 and thus provide a means for regu dating the amount of air admitted through the respective ports -'l() into the casing. "It is also evident that by means of the "handle, 38, that the main air control valve 36 may be oscillated bodily and carry with it the auxiliary member 42, the control of the v member 4? being independent of the member -36 so that according to the varying conditions due to temperature, altitude and quality of fuel, the-member 42 may be adjusted at will.

In order to provide a means, whereby the '-initial jet 18 will properly direct the fuel so that the same will be properly converted into carbureted air and delivered into the manifold of the engine in the best possible explosive mixture, the device as particularly shown in Figs. 9 and i0 is employed. In this instance, the plate 50 is connected to the sealed end of the casing 1 and has its port 51 disposed in line with the lower end of the upwardly inclined air conductirg tube 52, as clearly shown in l ig. t, the out let end thereof being disposed adjacent the upper portion of the nozzle 18 and outlet ting into the inlet or lower end of the tube 53 connected to and carried by the main de- Hector .38 at one side thereof. The outlet nozzle 5-1 m the member 5 5 is inclined to 'ard the center of the :asing 1 and projeets within the directing member 2, as clearly shown in Figs. 3 and l, so that the inrushing air carried by the tube 52 will be pron erly directed around the outlet end of the nozzle or jet 18 and into the lower end of the directing member 53, the i'nixture of carbureted air being thus directed through the nozzle 54: into the member 2 of the casing 1 and consequently in a confined and prop-- erly mixed stream to be directed to the manifold of the engine.

The present device is adapted to be used at the initial starting of the engine and also under low speeds, it being possible to introduce a sutlicient quantity of the mixture and in the proper piopor'timi to impart to the shaft of the engine a slow rotation to produce the necessary low speed when the engine is running free. In order to manually control the introduction oi the air through the port and into the nozzle or conduit 5'2, the casing 5:7 is carried by the plate 50 and has mounted therein the cylindrical valve member '36 controlled by the handle 57 in ready access to the operator. The locking device 8 is provided to engage the handle portion 57 and thus maintain the valve 56 in the desired adjustment From the foregoing description taken in connection with the d aivings, it evident that Wlwn the parts are in normal position, that-all oi the valves controlling the nozzles 19 are closed, the respective recessed portions being adjacent the inner ends there of, that the enrings 32 will maintain the same closed, the nozzle 18 however being open, so that the fuel is injected therefrom concentrically of the lower inlet end of the air directing member 53. At the same time, the air contri'illing' member 3 5 is positioned to close the ports m -4o, the respective edges fill--39 being: thcrrabove, one being farther above the other. so that the port 40 will be opened before the port 40 as the jets or nozzles 15) upon the side adjacent to the port 40 will be the: first set to sinitressivrly open a t'trr the initial starting of a motor through the operation of the jet 1%; and the air controlling: device as shown in Figs. 9 and 10.

in order to start the motor, the valve 56 is open and the engine in the usual way is cranked to produce the new nary suotion \vhirh causes air to rush through the port 51 into the ronduit 52 about the outlet end of the nozzle 1% and through the air direct ing auxiliary manifold 3 and i into the manifold of the engine.

What is claimed is: l. carburetor. including separate sets inlets in succession, and means operated in means. including two telescopic cylindrical members, the outer one ofiwhich controls the air port and the inner one of which con trols the active area of the other member. l. A carburetor, including a cylindrical easing provided with a longitudinally disposed air port in one side thereof, a plurality of fuel inlets disposed within the casing to receive the air from the port, an oscillatory means for controlling the air portage mounted in the casing, said latter means including two telescopic cylindrical members, the outer one of Which controls the air port and the inner one of which controls the active area of the other member, and means for adJusting the two members relatively to each other. I

' A carbureter, including a cylindrical casing provided with a longitudinally Cl1S- v posed air port in one side thereof, a. plurality 'of fuel inlets disposed within the;

casing to receive the air from the portyan oscillatory means for controlling the air portage mounted in the casing, said latter means including two telescopic cylindrical members, the outer one of which controls the air port and the inner one of which controls the active area of the other member, means for adjusting the twoincmbers relatively to each other, means for operating thefuel inlets progressively, and means for operating the last means and the air controlling means in consonance.

6. A carlun-etcr, including acylindrical casing provided with a longitudinally disposed airport, the edges of which are parallel, a plurality of fuel inlets mounted in the casing, means for opening the inlets in succession, and means for gradually opening the air port as the fuel inlets are successirely opened, said latter means including a member. mounted in the-casing for 0scillation and provided with an inclined edge for passage across the air port of the casing to gradually increase the air portage from one end thereof throughout its length.

'7. A carbureter, including a cylindrical :asing provided with a longitudinally disposed air port, the edges of which are parallel, a plurality of fuel inlets mounted iii the casing, means for opening the inletsgin succession, means for gradually opening the air port as the fuel inlets are successiyely opened. said latter means including a mem her mounted in the casing for oscillation and provided with an inclined edge for passage across the air port of the casing to gradually increase the air portage from one end thereof throughoutits length, and adjust able means for controllingvthe active area of such inclined edge.

S. A carbureter, including a cylindrical casing provided with a longitudinally dis posed air vort, the edges of which are parallel, a. plurality of fuel inletsmounted in the casing, means for opening the inlets in succession, means for gradually opening the -air ports as the fuel inlets are -successively opened, said latter means including a 1116111 her mounted in the casing for oscillation and provided with an inclined edge for passage across the air port of the casing. to gradually increase the air portage from one end thereof throughout its length, a mem ber telescoping the first member and provided with an inclined edge for movement into and out of registration with the inclined edge of the first member, said edge being further provided with recessed portion near one end, whereby the acti 'e area and a greater portion of the air portage is reduced while the recess produces a confining air admitting port for fone of the fuel inlets. o

In testimony that I claim the foregoing as my own, I have hereto ailixed my signature in the presence of two witnesses.

' RALPH A. DUFF. Witnesses i SELI'NA VViLLsoN,

I, E. SIMPSON, 

